The Trek Model 152-1 Surface/Volume Resistance Meter is designed to precisely measure surface or volume resistance on a wide variety of conductive, dissipative, and insulative materials.  It features exceptional measurement accuracy and wide measurement ranges. When used with Trek’s uniquely-designed 152P-CR-1 concentric ring probe (shown to left), the instrument provides consistent ease of operation even at very high resistance values. The Model 152-1 is lightweight, portable and operable via batteries or an AC line power source with battery eliminator.